Z-probe doesn't stop

Community Discussion 📄 General
1

I have a Sainsmart 3020 with a homemade touch plate of 4.94mm thickness. I have not had any problems using it with UGS.

Z probe settings are: type Z probe; thickness 4.94mm; probe distance 30mm; fast find 150mm; slow find 75mm; Sainsmart.

After the probe circuit is confirmed, the bit lowers, touches the plate, then raises and begins lowering again. It does not stop, but buries itself in the workpiece. If I move the workpiece to the side, it will lower the whole 30mm Z probe distance and then throw up an error code about not contacting the surface within the specified distance.

What am I missing here?

Thanks in advance.

John

2

@JohnT Welcome to the group, John

I assume that you are now using gSender, yes?

It sounds like you are moving the touchplate after the first touch. If you are, that’s your problem. gSender will probe twice - once at fast find and once at slow. Don’t move the plate in between the two. If you do, it will keep lowering in search of the touchplate.

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3

That will do it! Duh! I was manually lifting the touch plate up to the bit to activate the circuit! If there are instructions on that in Gsender, I haven’t seen them. No wonder! Thanks!

4

There are some tutos on probing, mainly on the auto touch plate but most of the proces is fairly simular when only z probing.

Some good info on probing errors a d what they are and how to cope with them are included.

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5

@JohnT You do start the process by raising the plate to touch the bit. This ensures that all the connections are good. In addition to the video that @Spamming_Eddie posted, take a look at the gSender documentation here

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6

Hey @JohnT,

You can checkout our resources for probing HERE. Glad you got it figured out!

Cheers,

Stephen

7

Thaks all! I was moving the touch plate before the second probe…

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